HFpEF and Symptomatic Obstructive Iliofemoral Venous Disease Study

Inclusion Criteria: * Willing and able to provide informed consent and comply with all study requirements * Age ≥ 40 years of age * Stable, symptomatic heart failure with preserved ejection fraction and a H2FpEF Score ≥4 * Presence of non-malignant inferior vena cava obstruction, a unilateral or bilateral chronic non-malignant obstruction of the common femoral vein, external iliac vein, common iliac vein, or any combination thereof, defined as a ≥50% reduction in target vessel lumen diameter defined by screening MRV, CTV and confirmed by a 50% reduction in luminal area as assessed by intraprocedural IVUS. * Previous (\>6 months) history of ilio-femoral and/or lower extremity deep venous thrombosis associated with a residual ilio-femoral venous obstruction ≥50% by MRV, CTV. * Clinically significant venous obstruction meeting CEAP Clinical classification ≥3. * Negative pregnancy test in females of child-bearing potential Exclusion Criteria: * Subject hospitalized for acute compensated heart failure within 60 days prior to enrollment * Presence of history of clinically significant pulmonary emboli within 6 months prior to enrollment. * Subject has any permanent neurologic defect that may cause non-compliance with the protocol * Subject has known life-limiting immunosuppressive or autoimmune disease (e.g., human immunodeficiency virus, systemic lupus erythematous). * Subject has an allergy to contrast media that cannot be adequately pre-treated prior to the required diagnostic and/or endovascular procedures. * Subject has an active peptic ulcer or active gastrointestinal (GI) bleeding. * Subject has renal failure or chronic kidney disease with glomerular filtration rate (GFR) ≤ 30 mL/min or Modification of Diet in Renal Disease (MDRD) study equation result of ≤ 30 mL/min per 1.73 m2. * Subject has white blood cell (WBC) count \< 3.0 (3000 cells/mm3) within 7 days prior to index procedure. * Subject has a platelet count \< 80,000 cells/mm3 or \> 700,000 cells/mm3 ≤ 7 days pre procedure; uncorrected hemoglobin of ≤9 g/dL. * Subject has known or suspected active systemic infection evidenced by WBC \> 14.0 (14,000/mm3). * Subject is currently participating in another investigational drug or device study. * Subject intends to participate in another investigational drug or device study within 30 days after the index procedure. * Subject has moderate or severe pulmonary disease (i.e., COPD) considered by Investigator to be a major contributing factor to the subject's exertional dyspnea